Tissue removal device and method of use
A biopsy device for acquiring a tissue sample is disclosed. The biopsy device comprises a partoff mechanism which can have at least a tab and an actuator. The actuator can be used to control the angle of the tab and thus partoff a tissue sample. The tab may be on a cutter tube, which may have a sharp distal end which may core the samples from the mass of tissue. Multiple tissue samples may be collected.
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This application is a continuation-in-part of PCT International Application No. PCT/US 2014/052,431 filed Aug. 26, 2014, which claims the benefit of U.S. Provisional Application Nos. 61/872,678, filed Aug. 31, 2013; and 61/872,674, filed Aug. 31, 2013, which are both incorporated by reference herein in their entireties.
BACKGROUND OF THE INVENTION1. Field of the Invention
This invention relates to medical instrumentation. More particularly, a tool used for acquiring tissue and a method for using the same are disclosed.
2. Description of the Prior Art
A number of medical procedures require the removal of tissue samples from a patient. These operations can range from the removal of suspicious tissue, as in the biopsy of a cancerous lesion, to cell harvesting, as in a bone marrow donation. A number of different biopsy tools are used for retrieving these tissue samples from patients. One style of biopsy tool may be called forward coring. A forward coring biopsy tool may include a spinning cannula with a razor edge. As the device is advanced into a tissue mass, the cannula may core the tissue. The cored tissue sample must then be parted off from the remaining tissue mass. There are a number of methods for parting off the tissue sample, such as tearing or cutting. There are two main styles of core biopsy tools—side cutting and forward coring.
SUMMARY OF THE INVENTIONA tool used to obtain tissue samples is disclosed herein. The partoff mechanism of the tool can be comprised of at least one tubular element. The tubular element may be spun along a central axis. The distal end of the tubular element may comprise a flexible partoff tab. The angle of this partoff tab may be adjusted during use. For example, the partoff tab may be flush with the remainder of the tube wall while advancing the device into a mass of tissue & while coring a tissue sample; the partoff tab may be angled inwards to partoff the sample from the tissue mass. The tube may be spinning as the partoff tab is repositioned; if the tube is spinning, the partoff tab may cut the tissue mass as it is being repositioned. The partoff tab may remain positioned inwards to secure the samples within the tubular element (e.g. the partoff tab may prevent the samples from falling out of the terminal distal end of the tubular element).
A tool for acquiring tissue is disclosed. The tool can have a cutter tube comprising a tubular system and a partoff tab. The partoff tab may have a partoff tab first end and a partoff tab second end. The partoff tab first end can be secured to the tubular system. The partoff tab second end can be secured to the tubular system. The cutter tube can have a tubular longitudinal axis. The partoff tab can have a longitudinally expanded configuration and a longitudinally contracted configuration. The length of the partoff tab along the tubular longitudinal axis in the longitudinally expanded configuration may be longer than the length of the partoff tab in the longitudinally contracted configuration.
A tool for acquiring tissue may be comprised of a cutter tube, a partoff tab having a partoff tab first and second ends and an actuator. The partoff tab first end can be secured to the cutter tube. The partoff tab second end can be secured to the actuator. The length of the partoff tab along the tubular longitudinal axis in the longitudinally expanded configuration may be longer than the length of the partoff tab in the longitudinally contracted configuration.
A tool for acquiring tissue may comprise a cutter tube. The cutter tube may comprise the tubular system and the partoff tab. The length of the partoff tab along a tubular longitudinal axis in the longitudinally expanded configuration may be longer than the length of the partoff tab in the longitudinally contracted configuration. The partoff tab can have two flex points, when in the contracted configuration.
A tool for acquiring tissue may comprise a cutter tube. The cutter tube may comprise the tubular system and the partoff tab. The length of the partoff tab along a tubular longitudinal axis in the longitudinally expanded configuration may be longer than the length of the partoff tab in the longitudinally contracted configuration. The partoff tab can has one inflection point, when in the contracted configuration.
A tool for acquiring tissue may comprise a cutter tube, a partoff tube and an actuator. The partoff tab can have two flex points, when in the contracted configuration.
A tool for acquiring tissue may comprise a cutter tube, a partoff tube and an actuator. The partoff tab can has one inflection point, when in the contracted configuration.
A method for operating a mass removal device is disclosed. The mass removal device may comprise a cutter tube, comprising the tubular system and the partoff tab. The partoff tab can have a partoff tab first end and a partoff tab second end. The partoff tab first end can be secured to the tubular system. The partoff tab second end can be secured to the tubular system. The method can comprise actuating the partoff tab, wherein the actuating comprises extending the partoff tab radially inwardly or outwardly relative to the cutter tube.
A method for operating a mass removal device is disclosed. The mass removal device may comprise a cutter tube, an actuator and a partoff tab. The partoff tab can have a partoff tab first end and a partoff tab second end. The partoff tab first end can be secured to the cutter tube. The partoff tab second end can be secured to the actuator. The method can comprise actuating the partoff tab, wherein the actuating comprises extending the partoff tab radially inwardly or outwardly relative to the cutter tube.
The internal diameter of the cutter tube 10 may be larger than about 0.04 in (1.0 mm), yet more narrowly larger than about 0.06 in (1.5 mm), yet more narrowly larger than about 0.08 in (2.0 mm), yet more narrowly larger than about 0.1 in (2.5 mm), yet more narrowly larger than about 0.12 in (3.0 mm), yet more narrowly larger than about 0.14 in (3.5 mm) or yet more narrowly larger than about 0.16 in (4.0 mm). The internal diameter of the cutter tube 10 may be less than about 0.16 in (4.0 mm), or yet more narrowly smaller than about 0.14 in (3.5 mm), or yet more narrowly smaller than about 0.12 in (3.0 mm), or yet more narrowly smaller than about 0.10 in (2.5 mm), or yet more narrowly smaller than about 0.08 in (2.0 mm), or yet more narrowly smaller than about 0.06 in (1.5 mm) or yet more narrowly smaller than about 0.04 in (1.0 mm).
The wall thickness of the cutter tube 10 may be larger than about 0.002 in (0.05 mm), or yet more narrowly larger than about 0.004 in (0.10 mm) or yet more narrowly larger than about 0.006 in (0.15 mm). The wall thickness of the cutter tube 10 may be smaller than about 0.006 in (0.15 mm), or yet more narrowly smaller than about 0.004 in (0.10 mm) or yet more narrowly smaller than about 0.002 in (0.05 mm). The wall thickness of the cutter tube 10 may vary. For example, the partoff tab 30 may have a different wall thickness than the actuator 32.
The cutter tube 10 may have a window 52. The window 52 may provide an exit for trapped tissue and/or mass. For example, when the partoff tab 30 switches from the configuration shown in
The partoff tab 30 may be secured to multiple elements, including the cutter tube 10, the tubular structure 50, the actuator 32 or any combination thereof. For example, if one of the flex points 37a, 37b or 37c breaks, the partoff tab 30 may still be secured to the tool 5. The partoff tab 30 may be able to generate high forces if it is secured to the tool 5 in multiple locations (e.g., flex points 37a and/or 37b). For example, the force applied to the actuator 32 may result in a radial force at the flex point 37c that may be approximately 40 to 60% higher than the force applied to the actuator 32.
The cutter tube 10 or any or all elements of the tool and/or other tools or apparatuses described herein can be made from or coated with, for example, single or multiple stainless steel alloys, steel, spring steel, nickel titanium alloys (e.g., Nitinol), cobalt-chrome alloys (e.g., ELGILOY® from Elgin Specialty Metals, Elgin, Ill.; CONICHROME® from Carpenter Metals Corp., Wyomissing, Pa.), nickel-cobalt alloys (e.g., MP35N® from Magellan Industrial Trading Company, Inc., Westport, Conn.), molybdenum alloys (e.g., molybdenum TZM alloy), tungsten-rhenium alloys, polymers such as polyethylene teraphathalate (PET), polyester (e.g., DACRON® from E. I. Du Pont de Nemours and Company, Wilmington, Del.), polypropylene, aromatic polyesters, such as liquid crystal polymers (e.g., Vectran, from Kuraray Co., Ltd., Tokyo, Japan), ultra high molecular weight polyethylene (i.e., extended chain, high-modulus or high-performance polyethylene) fiber and/or yarn (e.g., SPECTRA® Fiber and SPECTRA® Guard, from Honeywell International, Inc., Morris Township, N.J., or DYNEEMA® from Royal DSM N.V., Heerlen, the Netherlands), polytetrafluoroethylene (PTFE), Parylene polyp-xylylene) polymers, Parylene N, Parylene C, Parylene D, expanded PTFE (ePTFE), polyether ketone (PEK), polyether ether ketone (PEEK), polycarbonate (PC), Acrylonitrile Butadiene Styrene (ABS), poly ether ketone ketone (PEKK) (also poly aryl ether ketone ketone), nylon, polyether-block co-polyamide polymers (e.g., PEBAX® from ATOFINA, Paris, France), aliphatic polyether polyurethanes (e.g., TECOFLEX® from Thermedics Polymer Products, Wilmington, Mass.), polyvinyl chloride (PVC), Nylon, Vinyl, polyurethane, thermoplastic, fluorinated ethylene propylene (FEP), absorbable or resorbable polymers such as polyglycolic acid (PGA), poly-L-glycolic acid (PLGA), polylactic acid (PLA), poly-L-lactic acid (PLLA), polycaprolactone (PCL), polyethyl acrylate (PEA), polydioxanone (PDS), and pseudo-polyamino tyrosine-based acids, extruded collagen, silicone, zinc, echogenic, radioactive, radiopaque materials, a biomaterial (e.g., cadaver tissue, collagen, allograft, autograft, xenograft, bone cement, morselized bone, osteogenic powder, beads of bone), a material with high strength (60 ksi) and biocompatibility, any of the other materials listed herein or combinations thereof. Examples of radiopaque materials are barium sulfate, zinc oxide, titanium, stainless steel, nickel-titanium alloys, tantalum and gold. The device can be made from substantially 100% PEEK, substantially 100% titanium or titanium alloy, or combinations thereof.
The cutter tube 10 may spin or rotate at a velocity relative to the handle 6 of greater than about 1,000 rpm, yet more narrowly larger than about 2,500 rpm, yet more narrowly larger than about 3,000 rpm, yet more narrowly larger than about 4,000 rpm, yet more narrowly larger than about 5,000 rpm, yet more narrowly larger than about 7,500 rpm, yet more narrowly larger than about 10,000 rpm. The cutter tube 10 may spin or rotate at a velocity relative to the handle 6 of less than about 10,000 rpm, yet more narrowly less than about 7,500 rpm, yet more narrowly less than about 5,000 rpm, yet more narrowly less than about 4,000 rpm, yet more narrowly less than about 3,000 rpm, yet more narrowly less than about 2,500 rpm, yet more narrowly less than about 1,000 rpm.
The internal diameter of the cutter tube 10 may be larger than about 0.5 mm (0.02 in), more narrowly larger than about 1 mm (0.04 in), yet more narrowly larger than about 1.5 mm (0.06 in), yet more narrowly larger than about 2 mm (0.08 in), yet more narrowly than about 2.5 mm (0.10 in), yet more narrowly larger than about 3 mm (0.12 in), yet more narrowly larger than about 3.5 mm (0.14 in), yet more narrowly larger than about 4 mm (0.18 in), yet more narrowly larger than about 4.5 mm (0.18 in), yet more narrowly larger than about 5 mm (0.20 in), yet more narrowly larger than about 6 mm (0.24 in), yet more narrowly larger than about 7 mm (0.28 in), or yet more narrowly larger than about 10 mm (0.39 in). The internal diameter of the cutter tube 10 may be less than about 10 mm (0.39 in), more narrowly less than about 7 mm (0.28 in), yet more narrowly less than about 6 mm (0.24 in), yet more narrowly less than about 5 mm (0.20 in), yet more narrowly less than about 4.5 mm (0.18 in), yet more narrowly less than about 4 mm (0.18 in), yet more narrowly less than about 3.5 mm (0.14 in), yet more narrowly less than about 3 mm (0.12 in), yet more narrowly less than about 2.5 mm (0.10 in), yet more narrowly less than about 2 mm (0.08 in), yet more narrowly less than about 1.5 mm (0.06 in), yet more narrowly less than about 1 mm (0.04 in), or yet more narrowly less than about 0.5 mm (0.02 in).
The wall thickness of the cutter tube 10 may be larger than about 0.05 mm (0.002 in), more narrowly larger than about 0.10 mm (0.004 in), yet more narrowly larger than about 0.15 mm (0.006 in), yet more narrowly larger than about 0.20 mm (0.008 in), yet more narrowly larger than about 0.30 mm (0.012 in), yet more narrowly larger than about 0.50 mm (0.020 in), yet more narrowly larger than about 0.70 mm (0.028 in), or yet more narrowly larger than about 1.00 mm (0.039 in). The wall thickness of the cutter tube 10 may be less than about 1.00 mm (0.039 in), yet more narrowly less than about 0.70 mm (0.028 in), yet more narrowly less than about 0.50 mm (0.020 in), yet more narrowly less than about 0.43 mm (0.017 in), yet more narrowly less than about 0.30 mm (0.012 in), yet more narrowly less than about 0.20 mm (0.008 in), yet more narrowly less than about 0.15 mm (0.006 in), yet more narrowly less than about 0.10 mm (0.004 in), or yet more narrowly less than about 0.05 mm (0.002 in).
The straight wire 41 and/or the spiral wire 43 may increase torsional fraction (e.g., deliver rotational force) between the tissue sample and the cutter tube 10. The straight wire 41 and/or the spiral wire 43 may not significantly impact traction (e.g., delivering no longitudinal force and providing minimal or no counter force in the longitudinal direction) in the longitudinal direction between the tissue sample and the straight wire 41 and/or the spiral wire 43. The straight wire 41 and/or the spiral wire 43 may be examples of surface features.
The coaxial introducer 54 and/or the actuator 32 may be actuators. Multiple tissue samples can be collected and/or obtained and/or parted-off without removing the tool from the mass of tissue (i.e., tissue mass).
U.S. patent application Ser. No. 13/653,395, filed Oct. 16, 2012; Ser. No. 13/452,863, filed Apr. 21, 2012, International Application No. PCT/US 2011/061089, filed Nov. 16, 2011, and U.S. Provisional Application No. 61/415,850, filed Nov. 21, 2010, are all incorporated by reference herein in their entireties.
It is apparent to one skilled in the art that various changes and modifications can be made to this disclosure, and equivalents employed, or combinations of any of the disclosed elements, characteristics, features, devices, tools, steps, or methods without departing from the spirit and scope of the invention. Any of the disclosed elements, characteristics, features, devices, tools, steps, or methods can be present as a singular or as a plurality regardless of whether the elements, characteristics, features, devices, steps, or methods are explicitly disclosed herein as being singular or as a plurality. Elements shown with any variation are exemplary for the specific variation and can be used on other variation within this disclosure.
Claims
1. A tool for acquiring a tissue comprising:
- a cutter tube with an open distal end and a partoff tab;
- an outer tube located concentrically outside the cutter tube with an open distal end; and
- a handle;
- wherein the partoff tab has a partoff tab first end and a partoff tab second end, wherein the partoff tab first end is secured to the cutter tube, and wherein the partoff tab second end is secured to the outer tube,
- wherein the cutter tube has a tubular longitudinal axis, and
- wherein the partoff tab has a longitudinally expanded configuration and a longitudinally contracted configuration, and
- wherein the cutter tube and the outer tube are configured to rotate with respect to the handle when the partoff tab is in the longitudinally contracted configuration;
- wherein the length of the partoff tab along the tubular longitudinal axis in the longitudinally expanded configuration is longer than the length of partoff tab along the tubular longitudinal axis in the longitudinally contracted configuration;
- and wherein the cutter tube and the outer tube are configured to simultaneously rotate at the same velocity at the partoff tab first end and the partoff tab second end.
2. The tool of claim 1, wherein when the partoff tab is in the longitudinally contracted configuration, the partoff tab has three flex points.
3. The tool of claim 1, wherein the partoff tab has a first length and a second length, and wherein when the partoff tab is in the longitudinally contracted configuration, the partoff tab first length extends radially inward relative to the cutter tube and the partoff tab second length extends radially inward relative to the cutter tube.
4. The tool of claim 1, wherein the partoff tab has a partoff edge; and wherein the partoff edge has an angle from 25 degrees to 55 degrees.
5. A tool for acquiring a tissue comprising:
- a handle and a cutter tube comprising a tubular system and a partoff tab,
- wherein the partoff tab has a partoff tab first end and a partoff tab second end, wherein the partoff tab first end is secured to the tubular system, and wherein the partoff tab second end is secured to the tubular system,
- wherein the cutter tube has a tubular longitudinal axis, and
- wherein the partoff tab has a longitudinally expanded configuration and a longitudinally contracted configuration, and
- wherein the length of the partoff tab along the tubular longitudinal axis in the longitudinally expanded configuration is longer than the length of partoff tab along the tubular longitudinal axis in the longitudinally contracted configuration; and
- wherein the partoff tab is fully contained within the tubular system when in the longitudinally contracted configuration; and
- wherein the cutter tube is configured to rotate at more than 1,000 rpm with respect to the handle, while the partoff tab remains intact;
- and wherein the partoff tab first end and the partoff tab second end are configured to rotate at the same velocity when acquiring the tissue.
6. The tool of claim 5, wherein the partoff tab is annealed.
7. The tool of claim 5, further comprising a motor located within the handle and configured to rotate the cutter tube.
8. A tool for acquiring a tissue comprising:
- a coring control, a cutter tube, a tubular system and a partoff tab,
- wherein the partoff tab has a partoff tab first end and a partoff tab second end, wherein the partoff tab first end is secured to the tubular system, and wherein the partoff tab second end is secured to the cutter tube,
- wherein the cutter tube has a tubular longitudinal axis, and
- wherein the partoff tab has a longitudinally expanded configuration and a longitudinally contracted configuration, and
- wherein the length of the partoff tab along the tubular longitudinal axis in the longitudinally expanded configuration is longer than the length of partoff tab along the tubular longitudinal axis in the longitudinally contracted configuration; and
- wherein the partoff tab is configured such that the radial distance from the partoff tab to the tubular longitudinal axis is smaller when in the longitudinally contracted configuration than when in the longitudinally expanded configuration; and
- wherein the cutter tube and the tubular system are configured to rotate with respect to the coring control when the partoff tab is in the longitudinally contracted configuration;
- and wherein the cutter tube and the tubular system are configured to simultaneously rotate at the same velocity at the partoff tab first end and the partoff tab second end.
9. The tool of claim 8, wherein the partoff tab is annealed.
10. The tool of claim 8, wherein a terminal distal end of the cutter tube is chemically sharpened.
11. The tool of claim 8, further comprising a handle; and wherein the handle comprises the coring control.
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Type: Grant
Filed: Oct 19, 2014
Date of Patent: Dec 8, 2015
Patent Publication Number: 20150065912
Assignee: (San Francisco, CA)
Inventor: Robert Peliks (San Francisco, CA)
Primary Examiner: Max Hindenburg
Assistant Examiner: Jonathan M Foreman
Application Number: 14/517,873
International Classification: A61B 10/00 (20060101); A61B 17/32 (20060101); A61B 10/02 (20060101); A61B 10/04 (20060101);